2215115215491 has 8 divisors (see below), whose sum is σ = 3022172697280. Its totient is φ = 1442400605352.

The previous prime is 2215115215483. The next prime is 2215115215499. The reversal of 2215115215491 is 1945125115122.

2215115215491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2215115215483) and next prime (2215115215499).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2215115215491 - 2³ = 2215115215483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2215115215499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8585717761 + ... + 8585718018.

It is an arithmetic number, because the mean of its divisors is an integer number (377771587160).

Almost surely, 2^{2215115215491} is an apocalyptic number.

2215115215491 is a deficient number, since it is larger than the sum of its proper divisors (807057481789).

2215115215491 is a wasteful number, since it uses less digits than its factorization.

2215115215491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17171435825.

The product of its digits is 36000, while the sum is 39.

The spelling of 2215115215491 in words is "two trillion, two hundred fifteen billion, one hundred fifteen million, two hundred fifteen thousand, four hundred ninety-one".